Disposable toothbrush



FIG. 1 is a typical side elevation view of a disposable toothbrush showing my new design.

FIG. 2 is a top plan view thereof.

FIG. 3 is a bottom plan view thereof.

FIG. 4 is a left end elevation view thereof.

FIG. 5 is a right end elevation view thereof. 

The ornamental design for a disposable toothbrush, as shown and described. 